Machine and cryostat integration:first thoughts on issues for 11T+collimator assembly

in the DS zones

V.Parma, CERN, TE-MSC

CERN, 12 June 2013

CERN, 11 October 2011

Dispersion suppressor zones, our playing groundP1, after LS1: bus-bars QF and QD stop after Q11 easier integration in QTC. Much easier if done in LS3 (DFB on surface)

P5, same as P1

P7, similar to P3

Relevant machine Integration issues In case trims needed:• Spare 600 A SC wires (3 pairs of spools)• But no spare current leads in DFBs (spares only in IR 4,6)

– Modify to add new current leads? complex (?) in-situ work– Use an existing unused circuit? to be checked

IR 1 & 5:• After LS1, QF and QD bus-bars stop after Q11: easier busbars routing through

11T+Collimator assyIR 7:• If 11T+collimator during LS2 can be coupled to displacement of DFB+SC link

(R2E): easier integration of additional 600 A leads

4/25

M1, M2

M3

5/25

Longitudinal space break-down

15’660 (IC to IC plane)

250

~6’214 (LCM)

250

~6’214 (LCM)

Sketch of a possible layout

~300*~142 ~142 ~300*

MCSMCDO

* Experience from QTC bus-bars routing

~2’380

Splices done at assembly

B-Bar Expansion lyra

B-Bar Fixed point

Fixed support

Sliding support

External jack

Timeline for LS2

11 T + collimators assy ready for installation

11 T + collimators assy testing

11 T + collimators cryostat assembly

Cryostat procurement

11 T + collimators cryostat Engineering & Design

Latest start of Engineering & Detailed designPreliminary study

1st 11T proto 2-in-1 (c.f.r. M.Karrpinen’s talk)

CM/cryostat integration work

Preliminary study (up to end 2013)• 3-D modeling with existing designs of components (see my table,

1st column)• Study CM-specific bus bars integration inside end caps and along

magnet:– routing of M1,M2 (no need for Pt1,5!) and lyras– M3 routing, connections, diode and connections, lyras

• Study for MQ-dipole-dipole and dipole-dipole-MQ slots • Study inter CMs busbars routing line and connections• Study CMs cryostat assembly and tooling

Assess integration complexity and identify areas for length optimisation, needs for specific development, plan engineering and design effort from 2014 onwards

9/25

Cryostat specific issues

Start from and possibly preserve (as far as possible), from LHC and QTC designs:• Vacuum vessel external envelope:– impact on tunnel passage, and transport

• Thermal shield bottom tray design (see QTC design)

• M1-3 bus bars routing lines • Standard interconnects

we need to involve an LHC experienced designer (obvious names in mind)

10/25

Spare slides

11/25

QTC assy drwg

DFBA in Pt 2

DFBAs at P2 are also feeding Q6